职称英语考试完形填空历年试题及解析

第第页职称英语考试完形填空历年试题及解析

WonderWebs

Spiderwebsaremorethanhomes,andtheyareingenioustraps.AndtheworldsbestwebspinnermaybetheGoldenOrbWeaverspider.ThefemaleOrbWeaverspinsaweboffibersthinenoughtobeinvisibletoinsectprey,yet1enoughtosnareaflyingbirdwithoutbreaking.

Thesecretofthewebsstrength?Atypeofsuper-resilient2calleddragline.Whenthefemalespiderisreadyto3thewebsspokesandframe,sheusesherlegstodrawtheairythreadoutthroughahollownozzleinherbelly.Draglineisnotsticky,sothespidercanracebackandforthalong4tospinthewebstrademarkspiral.

Unlikesomespidersthatweaveanewwebeveryday,aGoldenOrbWeaver5herhandiworkuntilitfallsapart,sometimesnotfortwoyears1.ThesilkythreadisfivetimesstrongerthansteelbyweightandabsorbstheforceofanimpactthreetimesbetterthanKevlar,ahigh-strengthhuman-made6usedinbullet-proofvests.Andthankstoitshightensilestrength,ortheabilitytoresistbreakingunderthepullingforcecalledtension,asinglestrandcanstretchupto40percentlongerthanitsoriginal7andsnapbackaswellasnew.Nohuman-madefiberevencomes8.

Itisno9manufacturersareclamoringforspidersilk.Intheconsumerpipeline:high-performancefabricsforathletesandstockingsthatneverrun2.Thinkparachutecordsandsuspensionbridgecables.Asteady10ofspidersilkwouldbeworthbillionsofdollarsbuthowtoproduceit?Harvestingsilkonspiderfarmsdoesnot11becausetheterritorialarthropodshaveatendencytodevourtheirneighhors.

Now,scientistsatthebiotechnologycompanyNe*iaarespinningartificialsilkmodeledafterGoldenOrbdragline.The12step:e*tractsilk-makinggenesfromthespiders.Ne*t,implantthegenesintogoateggcells.Thenannygoatsthatgrowfromtheeggssecretedraglinesilkproteinsintheir13."Theyounggoatspassonthesilk-makinggenewithout14helpfromus,'saysNe*iapresidentJeffryTurner.Ne*iaisstillperfectingthe

spinningprocess,buttheyhopeartificialspidersilkwillsoonbesnaggingcustomers15therealthingsnagsbugs.

说明：

1.sometimesnotfortwoyears：相当于sometimesitdoesnotfallapartfortwoyears

2.run：(编织物)抽丝

练习：

1.AtoughBsoftClargeDsmooth

2.AclothBsilkCnylonDwool

3.ArepairBpullCmoveDweave

4.AhimBherCitDthose

5.Arefi*esBreproducesCremakesDreuses

6.AmetalBmassCmaterialDmodel

7.AbredthBlengthCheightDstrength

8.AcloseBwellCopenDawake

9.AhurryBworryCwonderDuse

10.AshipmentBsupplyCrunDe*change

11.ArunBgoCdealDwork

12.ApreviousBforemostCfirstDfront

13.AmilkBmeatClungsDmuscle

14.AnoBanyCsomeDmany

15.AasfastasBasgentlyasCasfullyasDaslittleas

答案与题解：

1.Aflyingbird飞入蜘蛛网时有股冲力，网线坚韧才能捕获到它，所以选tough。本句中的withoutbreaking也指示tough。

2.B英语中蜘蛛网丝是spidersilk。见第三、第四段分别涌现的silkythread和spidersilk。

3.D本句说蜘蛛织网的机制和过程，所以选，weave而且，这种蜘蛛就叫GoldenOrbWeaver。

4.C从上下文判断，along之后接的是thedragline，其代词应为it。

5.D本句说GoldenOrbWeaver与某些种类的蜘蛛不同，它不用每天织新网，只要网不破，就能一贯运用下去，有时一用2年，所以选，reuses。

6.C本句将GoldenOrbWesver蜘蛛网的牢度和张度与防弹衣材料Kevlar对比，说明该蜘蛛网坚韧的程度。填入的词应当是Kevlar的.同位语，Kevlar是一种材料，所以选material。

7.B除了上下文的意思要求填length之外，本句中的用词stretch和longer都指示要用length。

8.Acome后面可接形容词。comeclose意为"接近'。comewell，comeopen，comeawake都能搭配，但意思与上下文配不上。

9.CItisnowonder(that)是"不足为奇，非常自然'的意思。只有选wonder意思才连贯。

10.B从意义上判断，asteadysupply是正确的选择。shipment(运输)、run(运转)或e*change(交换)的意思与上下文配不上。

11.D上下文的意思要求用"起作用'这个词，英语work在本句的词义是"起作用'。

12.C下一句是以Ne*t开始的。有ne*t，前面很可能有first之类表次序的词。

13.A